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Java Sample: Reading & Writing Operation using a single file


import java.io.*;
import java.math.*;
class jReadWrite
{   public static void main(String args[])
    {
        DataInputStream dis=null;
        DataOutputStream dos=null;
        File inFile=new File("rand.txt");
        try //Writing Content into File
        {
            dos=new DataOutputStream(new FileOutputStream(inFile));
            for(int i=0;i<=20;i++)
            {
                dos.writeInt((int)i);
            }
        }catch(Exception e){}
        
        try //Reading Content from File
        {
            dis=new DataInputStream(new FileInputStream(inFile));
            for(int i=0;i<=20;i++)
            {
                int n=dis.readInt();
                System.out.print(n+" ");
            }
        }catch(Exception ex){}
        
        try // Closing File
        {
            dis.close();
            dos.close();
        }catch(Exception ey){}
    }
}
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